Improve local docker startup time (#1401)

* add volume to cache dependancies

* docker install delve

* volume for go build cache

.dockerignore

@@ -0,0 +1,2 @@
+.git
+tmp

docker-compose.yaml

@@ -42,23 +42,21 @@ services:
     extends:
       file: docker-compose.common.yaml
       service: jimm-base
-    image: cosmtrek/air:latest
+    build:
+      context: .
+      dockerfile: ./local/Dockerfile
     profiles: ["dev"]
     # working_dir value has to be the same of mapped volume
     hostname: jimm.localhost
     working_dir: /jimm
     container_name: jimm
-    entrypoint:
-      - bash
-      - -c
-      - >-
-        go install github.com/go-delve/delve/cmd/dlv@latest
-        && air
     ports:
       - 17070:80
       - 2345:2345
     volumes:
       - ./:/jimm/
+      - go-modules:/go/pkg/mod # cache modules to improve startup
+      - go-cache:/root/.cache/go-build # cache build's artifacts to startup
 
   db:
     image: postgres
@@ -133,3 +131,7 @@ services:
       interval: 5s
       timeout: 10s
       retries: 30
+
+volumes:
+  go-modules:
+  go-cache:

local/Dockerfile

@@ -0,0 +1,6 @@
+# Installing delve in the image to avoid running go install in running containers
+FROM cosmtrek/air:latest
+
+RUN go install github.com/go-delve/delve/cmd/dlv@latest
+
+ENTRYPOINT [ "air" ]