diff --git a/caper/caper.py b/caper/caper.py
index 18829fdb..c27fb250 100644
--- a/caper/caper.py
+++ b/caper/caper.py
@@ -387,7 +387,11 @@ def metadata(self, no_print=False):
                 [(Caper.KEY_CAPER_STR_LABEL, v)
                  for v in self._wf_id_or_label])
         if not no_print:
-            print(json.dumps(m, indent=4))
+            if len(m) == 1:
+                m_ = m[0]
+            else:
+                m_ = m
+            print(json.dumps(m_, indent=4))
         return m
 
     def list(self):
@@ -398,7 +402,7 @@ def list(self):
             workflow_ids = ['*']
             labels = [(Caper.KEY_CAPER_STR_LABEL, '*')]
         else:
-            workflow_ids = self._wf_id_or_label,
+            workflow_ids = self._wf_id_or_label
             labels = [(Caper.KEY_CAPER_STR_LABEL, v)
                       for v in self._wf_id_or_label]
 
diff --git a/caper/caper_args.py b/caper/caper_args.py
index e95f64df..3b261dba 100644
--- a/caper/caper_args.py
+++ b/caper/caper_args.py
@@ -12,7 +12,7 @@
 from distutils.util import strtobool
 
 
-__version__ = '0.3.9'
+__version__ = '0.3.10'
 
 DEFAULT_JAVA_HEAP_SERVER = '5G'
 DEFAULT_JAVA_HEAP_RUN = '1G'
diff --git a/docs/conf_encode_workshop_2019.md b/docs/conf_encode_workshop_2019.md
new file mode 100644
index 00000000..8f4afc82
--- /dev/null
+++ b/docs/conf_encode_workshop_2019.md
@@ -0,0 +1,136 @@
+# Welcome to ENCODE user's meeting 2019 at Seattle
+
+## Do this before the workshop
+
+1. Open a web browser and go to [Google Cloud Platform console](https://console.cloud.google.com/compute/instances?project=encode-workshop&instancessize=50). Click on the `SSH` button on the `workshop-server` instance.
+
+2. Soft-link a shared configuration file.
+```bash
+$ mkdir -p ~/.caper && cd ~/.caper
+$ ln -s /opt/code/default.conf default.conf
+```
+
+3. Authenticate yourself to get access to buckets.
+```bash
+$ gcloud auth login --no-launch-browser
+$ gcloud auth application-default login --no-launch-browser
+```
+
+## To do together during workshop
+
+> **WARNING**: **USERS SHOULD NOT FOLLOW THE BELOW STEPS BEFORE THE WORKSHOP**.
+
+4. Submit a workflow to Caper server. `--deepcopy` is optional for remote data files in your input JSON. If all files defined in your input JSON is on a Google Cloud bucket then skip it.
+```bash
+$ caper submit /opt/code/demo-pipeline/demo.wdl -i [INPUT_JSON] --deepcopy
+# you will see the following message. make sure to remember the workflow_id
+# in this example, the workflow_id is f7094621-3d38-48a6-b877-1da2b0cec931
+[Caper] submit:  {'id': 'f7094621-3d38-48a6-b877-1da2b0cec931', 'status': 'Submitted'}
+```
+
+5. Make sure to remember `workflow_id` of your submitted workflow. You can monitor workflows with:
+```bash
+$ caper list [WORKFLOW_ID]
+```
+
+6. Once your workflow is done (marked as `Succeeded`). Retrieve a `metadata.json` with the following command:
+```bash
+$ caper metadata [WORKFLOW_ID] > metadata.json
+```
+
+7. Run Croo with the retrieved `metadata.json` to organized outputs on `--out-dir`.
+```bash
+$ croo metadata.json --out-dir gs://encode-workshop-outputs/croo/$USER/[PIPELINE_NAME]
+```
+
+8. Open a web browser and go to [Google Cloud Storage console](https://console.cloud.google.com/storage/browser/encode-workshop-outputs/croo/?project=encode-workshop&folder=true&organizationId=true). Navigate to your organized output directory. For example, `gs://encode-workshop-outputs/croo/[YOUR_USER_NAME]/[PIPELINE_NAME]`. Click on an HTML file then you will see a nice file table summarizing all outputs with description. Find any bigwig file in it and take a URL of it. Visualize it with your preferred genome browser.
+
+
+## Setting up a Caper server instance (ADMIN ONLY)
+
+This example is to set up a server instance for the ENCODE workshop 2019 at Seattle. However, this example should also be helpful to set up your own server instance.
+
+> **WARNING**: This section is for admins only. **USERS SHOULD NOT FOLLOW THE BELOW STEPS ON THE INSTANCE**.
+
+1. Create an instance with Debian-based Linux (e.g. Ubuntu). Minimum requirements for the server is CPU >=4, Memorsy > 16GB.
+
+2. Install softwares. Install Caper (Cromwell wrapper) and Croo (Cromwell output organizer).
+```bash
+$ sudo apt-get update && sudo apt-get install -y default-jdk acl python3 python3-pip git wget curl htop
+$ sudo pip3 install caper croo
+```
+
+3. Clone pipeline codes and share them with users. This example will install ENCODE RNA-Seq/Demo pipelines on `/opt/code`.
+```bash
+$ sudo mkdir /opt/code
+$ sudo chown $USER:$USER /opt/code
+$ cd /opt/code
+$ git clone https://github.com/ENCODE-DCC/rna-seq-pipeline
+$ git clone https://github.com/ENCODE-DCC/demo-pipeline
+```
+
+4. Authenticate yourself.
+```bash
+$ gcloud auth login --no-launch-browser
+$ gcloud auth application-default login --no-launch-browser
+```
+
+5. Create a scratch directory for Caper. Any subdirectories under `/srv/scratch` will inherit permissions from their parent directory.
+```bash
+$ sudo mkdir /srv/scratch
+$ sudo chown $USER:$USER /srv/scratch
+$ sudo chmod 777 /srv/scratch
+$ sudo setfacl -d -m u::rwx /srv/scratch
+$ sudo setfacl -d -m g::rwx /srv/scratch
+$ sudo setfacl -d -m o::rwx /srv/scratch
+```
+
+6. Create a Caper configuration file, which will be shared with all users.
+```bash
+$ touch /opt/code/default.conf
+```
+
+7. Edit the shared configuration file `/opt/code/default.conf`. You can comment settings for the ENCODE workshop 2019 and uncomment/define your own `gcp-prj`, `tmp-gcs-bucket` and `out-gcs-bucket`.
+```bash
+[defaults]
+cromwell=/opt/code/cromwell-42.jar
+java-heap-server=8G
+
+backend=gcp
+
+out-dir=/srv/scratch/caper_out
+tmp-dir=/srv/scratch/caper_tmp
+
+#gcp-prj=[YOUR_GOOGLE_PROJECT]
+gcp-prj=encode-workshop
+
+#out-gcs-bucket=[YOUR_OUTPUT_BUCKET_FOR_CAPER]
+#tmp-gcs-bucket=[YOUR_TMP_BUCKET_FOR_CAPER]
+out-gcs-bucket=gs://encode-workshop-outputs/caper_out
+tmp-gcs-bucket=gs://encode-workshop-outputs/caper_tmp
+
+max-concurrent-workflows=100
+```
+
+8. Download Cromwell 42 JAR and share it with all users.
+```bash
+$ cd /opt/code
+$ wget https://github.com/broadinstitute/cromwell/releases/download/42/cromwell-42.jar
+```
+
+9. Soft-link a shared configuration file.
+```bash
+$ mkdir -p ~/.caper && cd ~/.caper
+$ ln -s /opt/code/default.conf default.conf
+```
+
+10. Create Caper's output bucket `gs://encode-workshop-outputs`.
+
+11. Make the bucket public by adding a `Storage Object Viewer` role for `allUsers` to the bucket. This will allow public HTTP access to all files on the bucket, which will be used to visualize some of pipeline outputs (e.g. bigwigs) on a genome browser.
+
+12. Give write permission to **ALL WORKSHOP PARTICIPANTS* (not for all public users). Add `Storage Object Creator` role to all participants. This is to give all participants write access to Caper tmp directory `gs://encode-workshop-outputs/caper_tmp` so that `--deepcopy` does not make duplicate files on the shared bucket. This will also give them write access to `gs://encode-workshop-outputs/croo` so that their organized outputs generates from Croo will be writte on that bucket directory.
+
+13. Run a Caper server.
+```bash
+$ caper server
+```
diff --git a/docs/conf_gcp.md b/docs/conf_gcp.md
index b9335ad3..818d0ee2 100644
--- a/docs/conf_gcp.md
+++ b/docs/conf_gcp.md
@@ -26,3 +26,7 @@
     ```bash
     $ gcloud config set project [YOUR_PROJECT_NAME]
     ```
+
+# Setting up a Caper server instance
+
+You will find [this](./conf_encode_workshop_2019.md) useful to set up your own Caper server on Google Cloud Platform.