fix: fixed devtools urls

Makefile

@@ -0,0 +1,7 @@
+DC=docker-compose
+
+container-dev:
+	$(DC) -f docker-compose-develop.yml up --build
+
+container-prod:
+	$(DC) up

README.md

@@ -96,5 +96,12 @@ routes:
 
 I'm currently writing more documentation, it will be available on **Gitbook**: [http://micheleriva.gitbook.io/gauguin](http://micheleriva.gitbook.io/gauguin)
 
+# Env Variables
+```env
+PORT=<number>         # HTTPS Port
+DOCKERIZED=<boolean>  # Set to true if running Gauguin in Docker
+CHROME_URL=<string>   # Optional, the URL of the Chrome REST Debugging APIs 
+```
+
 # License
 **Gauguin** is distributed under the [GPLv3 open source license](/LICENSE.md).

chromium/chromium.go

@@ -27,17 +27,27 @@ type ChromeDevToolsVersion struct {
 }
 
 var isDockerized bool
+var chromeDevToolsURL string
 
 func init() {
 	isDockerized = os.Getenv("DOCKERIZED") == "true"
+	chromeURL := os.Getenv("CHROME_URL")
+
+	if isDockerized && chromeURL == "" {
+		chromeDevToolsURL = "http://alpine_chrome:9222/json/version"
+	} else if chromeURL != "" {
+		chromeDevToolsURL = chromeURL
+	} else {
+		chromeDevToolsURL = "http://localhost:9222/json/version"
+	}
 }
 
 func getCDTData() ChromeDevToolsVersion {
 	var CDTData ChromeDevToolsVersion
 
 	client := resty.New()
 
-	resp, err := client.R().SetHeader("HOST", "localhost").Get("http://alpine_chrome:9222/json/version")
+	resp, err := client.R().SetHeader("HOST", "localhost").Get(chromeDevToolsURL)
 	if err != nil {
 		log.Fatal(err)
 	}

controller/controller.go

@@ -73,6 +73,7 @@ func HandleRoutes(c *gin.Context) {
 	image := chromium.GenerateImage(tpl.String(), sizes.width, sizes.height)
 	img := bytes.NewReader(image)
 
+	c.Header("Cache-Control", "max-age=604800")
 	c.Render(http.StatusOK, render.Reader{ContentType: "image/jpeg", ContentLength: int64(img.Len()), Reader: img})
 }
 

docker-compose-develop.yml

@@ -0,0 +1,37 @@
+version: '3.7'
+
+services:
+
+  alpine_chrome:
+    image: zenika/alpine-chrome:latest
+    container_name: gauguin-chrome-alpine
+    command: [chromium-browser, "--headless", "--disable-gpu", "--no-sandbox", "--disable-dev-shm-usage", "--remote-debugging-address=0.0.0.0", "--remote-debugging-port=9222"]
+    ports:
+      - 9222:9222
+    restart: unless-stopped
+    networks:
+      - gauguin_net
+
+  gin_gonic:
+    container_name: gauguin-gin-gonic
+    build:
+      context: .
+      dockerfile: Dockerfile
+    links:
+      - alpine_chrome
+    depends_on:
+      - alpine_chrome
+    ports:
+      - 5491:5491
+    expose:
+      - '5491'
+    volumes:
+      - ./templates:/app/templates
+      - ./gauguin.yaml:/app/gauguin.yaml
+    restart: unless-stopped
+    networks:
+      - gauguin_net
+
+networks:
+  gauguin_net:
+    driver: bridge