feat: add healthchecks to Dockerfiles for api, basket, links, and uptime services (#380)

Author: sekhar08

api.Dockerfile

@@ -32,4 +32,10 @@ EXPOSE 3001
 
 WORKDIR /app/apps/api
 
+COPY healthcheck.ts /app/healthcheck.ts
+ENV HEALTHCHECK_PORT=3001
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+  CMD ["bun", "/app/healthcheck.ts"]
+
 CMD ["bun", "run", "src/index.ts"]

basket.Dockerfile

@@ -27,14 +27,20 @@ RUN bun build \
 	--bytecode \
 	./src/index.ts
 
-FROM gcr.io/distroless/cc
+FROM oven/bun:1.3.4-distroless
 
 WORKDIR /app
 
 COPY --from=build /app/server server
+COPY healthcheck.ts healthcheck.ts
 
 ENV NODE_ENV=production
+ENV HEALTHCHECK_PORT=4000
 
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+  CMD ["bun", "/app/healthcheck.ts"]
+
+ENTRYPOINT []
 CMD ["./server"]
 
 EXPOSE 4000

healthcheck.ts

@@ -0,0 +1,3 @@
+const port = process.env.HEALTHCHECK_PORT ?? process.env.PORT ?? "3000";
+const r = await fetch(`http://localhost:${port}/health`);
+process.exit(r.ok ? 0 : 1);

links.Dockerfile

@@ -28,14 +28,20 @@ RUN bun build \
 	--bytecode \
 	./src/index.ts
 
-FROM gcr.io/distroless/base
+FROM oven/bun:1.3.4-distroless
 
 WORKDIR /app
 
 COPY --from=build /app/server server
+COPY healthcheck.ts healthcheck.ts
 
 ENV NODE_ENV=production
+ENV HEALTHCHECK_PORT=2500
 
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+  CMD ["bun", "/app/healthcheck.ts"]
+
+ENTRYPOINT []
 CMD ["./server"]
 
 EXPOSE 2500

uptime.Dockerfile

@@ -23,14 +23,20 @@ RUN bun build \
     --bytecode \
     ./apps/uptime/src/index.ts
 
-FROM gcr.io/distroless/base
+FROM oven/bun:1.3.4-distroless
 
 WORKDIR /app
 
 COPY --from=build /app/server server
+COPY healthcheck.ts healthcheck.ts
 
 ENV NODE_ENV=production
+ENV HEALTHCHECK_PORT=4000
 
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+  CMD ["bun", "/app/healthcheck.ts"]
+
+ENTRYPOINT []
 CMD ["./server"]
 
 EXPOSE 4000