Update nginx:stable Docker digest to f2c6d8e

Dockerfile

@@ -5,7 +5,7 @@ WORKDIR /app
 COPY . .
 RUN yarn install && yarn build
 
-FROM nginx:stable@sha256:df6f3c8e3fb6161cc5e85c8db042c8e62cfb7948fc4d6fddfad32741c3e2520d
+FROM nginx:stable@sha256:f2c6d8e7b81820cc0186a764d6558935b521e1a3404647247d329273e01a1886
 COPY --from=builder /app/build /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 EXPOSE 80