Adding healthcheck to docker image

Dockerfile

@@ -16,11 +16,23 @@ RUN npm run build
 # Stage 2: Create the production image
 FROM node:slim
 
+RUN apt-get update && \
+    apt-get install -yqq --no-install-recommends wget && \
+    apt-get autoremove && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
 WORKDIR /app
 
 COPY --from=builder /app .
 COPY --chmod=755 entry.sh /entry.sh
 
+HEALTHCHECK --interval=30s \
+            --timeout=5s \
+            --start-period=10s \
+            --retries=3 \
+            CMD [ "/usr/bin/wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:3000/auth/isconfigured" ]
+
 EXPOSE 3000
 
 CMD ["/entry.sh"]