Add Health Check to Docker Container (#958)

As per title.

This adds a 'healthy' status to the docker container status.

cc @prologic

Co-authored-by: Phil S <ullarah@noreply@mills.io>
Reviewed-on: #958
Co-authored-by: Phil S. <ullarah@noreply@mills.io>
Co-committed-by: Phil S. <ullarah@noreply@mills.io>

Dockerfile

@@ -79,4 +79,7 @@ COPY --from=build /src/internal/theme /theme
 COPY .dockerfiles/entrypoint.sh /init
 
 ENTRYPOINT ["/init"]
+HEALTHCHECK --interval=10s --timeout=10s --retries=5 \
+        CMD wget -nv -t1 --spider 'http://localhost:8000' || exit 1
+
 CMD ["yarnd"]

docker-compose.yml

@@ -11,3 +11,9 @@ services:
     volumes:
       - ./data:/src/data
       - ./internal:/src/internal
+    healthcheck:
+      test: wget -nv -t1 --spider 'http://localhost:8000' || exit 1
+      interval: 10s
+      retries: 5
+      start_period: 10s
+      timeout: 10s

docker-stack.yml

@@ -16,6 +16,12 @@ services:
       - MAGICLINK_SECRET=supersecretchangeme
     volumes:
       - twtxt:/data
+    healthcheck:
+      test: wget -nv -t1 --spider 'http://localhost:8000' || exit 1
+      interval: 10s
+      retries: 5
+      start_period: 10s
+      timeout: 10s
 
 volumes:
   twtxt: