Add health check to the project

Dockerfile

@@ -41,7 +41,8 @@ RUN /bin/busybox mkdir -p /databunker/data && \
 # Tell docker that all future commands should run as the appuser user
 USER appuser
 COPY --from=builder /go/bin/databunker /databunker/bin/databunker
-COPY run.sh /databunker/bin/
+COPY run.sh health-check.sh /databunker/bin/
 EXPOSE 3000
+HEALTHCHECK --interval=5s --timeout=3s --start-period=33s --retries=3 CMD /databunker/bin/health-check.sh
 ENTRYPOINT ["/bin/sh", "/databunker/bin/run.sh"]
 #CMD ["/bin/sh", "-x", "-c", "/go/bin/databunker -init"]

health-check.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# check if Databunker is using SSL port
+if [ -n "$SSL_CERTIFICATE" ]; then
+  if [ -f "$SSL_CERTIFICATE" ]; then
+    /bin/busybox wget --tries=1 --spider --no-check-certificate -q https://localhost:3000/status || exit 1
+    exit 0
+  fi
+fi
+
+if [ -f "/databunker/certs/server.cer" ]; then
+  /bin/busybox wget --tries=1 --spider --no-check-certificate -q https://localhost:3000/status || exit 1
+  exit 0
+fi
+
+CERT_FILE=`/bin/busybox sed -n -e '/ssl_certificate:/ s/ .*ssl_certificate: "\(.*\)"/\1/p' /databunker/conf/databunker.yaml`
+if [ -n "$CERT_FILE" ]; then
+  if [ -f "$CERT_FILE"  ]; then
+    /bin/busybox wget --tries=1 --spider --no-check-certificate -q https://localhost:3000/status || exit 1
+    exit 0
+  fi
+fi
+
+# by default check http port
+/bin/busybox wget --tries=1 --spider -q http://localhost:3000/status || exit 1