installing docker cli

Dockerfile

@@ -6,7 +6,7 @@ WORKDIR /app
 # Copy go mod and sum files
 COPY go.mod go.sum ./
 
-# Download all dependancies. Dependencies will be cached if the go.mod and go.sum files are not changed
+# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
 RUN go mod download
 
 # Copy the source from the current directory to the Working Directory inside the container
@@ -24,6 +24,16 @@ WORKDIR /app/cmd/dnsq/
 # Build the q source into executable
 RUN GOOS=linux go build -o q .
 
+# Installing curl
+RUN apt-get update
+RUN apt-get install -y curl
+
+# Installing Docker CLI (not the whole installation)
+ENV DOCKER_VERSION=18.09.4
+RUN curl -sfL -o docker.tgz "https://download.docker.com/linux/static/stable/x86_64/docker-${DOCKER_VERSION}.tgz" && \
+  tar -xzf docker.tgz docker/docker --strip=1 --directory /app/cmd/docker/ && \
+  rm docker.tgz
+
 
 ######## Start a new stage from scratch #######
 FROM ubuntu:latest  
@@ -36,6 +46,9 @@ COPY --from=builder /app/cmd/coredns-healthcheck/ .
 # Copy the pre-built q binary from previous stage
 COPY --from=builder /app/cmd/dnsq/ .
 
+# Copy the docker cli to the bin
+COPY --from=builder /app/cmd/docker/ /usr/local/bin
+
 # Execute main when starting container
 ENTRYPOINT ["./main"]