add tcp port wait on docker entrypoint

fixed: #399

Signed-off-by: Avelino <t@avelino.xxx>

Dockerfile

@@ -7,5 +7,7 @@ RUN apk add --no-cache git && \
 
 FROM alpine
 COPY --from=builder /go/src/github.com/prest/prest/cmd/prestd/prestd /app/prestd
+RUN apk add --no-cache curl
 ADD ./cmd/prestd/prest.toml /app/prest.toml
-CMD ["/app/prestd"]
+ADD ./etc/entrypoint.sh /app/entrtpoint.sh
+ENTRYPOINT [ "/app/entrtpoint.sh" ]

docker-compose.yml

@@ -1,5 +1,15 @@
 version: "3"
 services:
+    postgres:
+        image: postgres
+        volumes:
+            - "./data/postgres:/var/lib/postgresql/data"
+        environment:
+            - POSTGRES_USER=prest
+            - POSTGRES_DB=prest
+            - POSTGRES_PASSWORD=prest
+        ports:
+            - "5432:5432"
     prest:
         build: .
         links:
@@ -8,21 +18,11 @@ services:
             - PREST_DEBUG=true # remove comment for enable DEBUG mode (disable JWT)
             - PREST_PG_HOST=postgres
             - PREST_PG_USER=prest
-            # - PREST_PG_PASS=prest
+            - PREST_PG_PASS=prest
             - PREST_PG_DATABASE=prest
             - PREST_PG_PORT=5432
             - PREST_JWT_DEFAULT=false # remove if need jwt
         depends_on:
             - postgres
         ports:
             - "3000:3000"
-    postgres:
-        image: postgres
-        volumes:
-            - "./data:/var/lib/postgresql/data"
-        environment:
-            - POSTGRES_USER=prest
-            - POSTGRES_DB=prest
-            - POSTGRES_PASSWORD=prest
-        ports:
-            - "5432:5432"

etc/entrypoint.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+
+curl -sfL https://raw.githubusercontent.com/gofn/tcp-port-wait/master/tcp-port-wait.sh | sh -s -- postgres 5432
+/app/prestd $@