Add health endpoint via nginx

.github/workflows/build-and-deploy-dev.yml

@@ -33,7 +33,7 @@ jobs:
   build-and-deploy:
     name: Build and Deploy
     needs: [upload-package-lock-json, make-react-secret-available]
-    uses: clearlydefined/operations/.github/workflows/app-build-and-deploy.yml@v2.0.0
+    uses: clearlydefined/operations/.github/workflows/app-build-and-deploy.yml@v3.1.2
     secrets: 
       AZURE_CREDENTIALS: ${{ secrets.AZURE_CREDENTIALS }}
       AZURE_WEBAPP_PUBLISH_PROFILE: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE_DEV }}

Dockerfile

@@ -3,14 +3,28 @@
 FROM node:14-alpine as builder
 COPY . /opt/website
 WORKDIR /opt/website
+
+# Set environment variables from build arguments
+ARG APP_VERSION="UNKNOWN"
+ENV APP_VERSION=$APP_VERSION
+ARG BUILD_SHA="UNKNOWN"
+ENV BUILD_SHA=$BUILD_SHA
+
 ARG REACT_APP_SERVER=http://localhost:4000
 ARG REACT_APP_GA_TRACKINGID
 RUN apk add --no-cache git
 RUN npm install -g npm@9
 RUN npm install
 RUN npm run build
 
-FROM nginx:alpine
-ADD nginx.conf /etc/nginx/conf.d/default.conf
+FROM nginx:1.19.6-alpine
+
+ARG APP_VERSION="UNKNOWN"
+ENV APP_VERSION=$APP_VERSION
+ARG BUILD_SHA="UNKNOWN"
+ENV BUILD_SHA=$BUILD_SHA
+
+RUN mkdir /etc/nginx/templates
+COPY default.conf.template /etc/nginx/templates
 COPY --from=builder /opt/website/build /usr/share/nginx/html
 EXPOSE 80

nginx.conf → default.conf.template

@@ -12,6 +12,11 @@ server {
         etag off;
     }
 
+    location /health {
+      add_header 'Content-Type' 'application/json';
+      return 200 '{"status":"OK", "version": "${APP_VERSION}", "sha": "${BUILD_SHA}"}';
+    }
+
     # redirect server error pages to the static page /50x.html
     #
     error_page   500 502 503 504  /50x.html;