Image build is optimized.

.gitlab-ci.yml

@@ -20,22 +20,22 @@ variables:
   DOCKER_TLS_CERTDIR: ""
   DOCKER_DAEMON_TIMEOUT: 300
 #  DOCKER_HOST: "unix:///var/run/docker.sock"
-  DOCKER_HOST: tcp://docker:2375/
+  DOCKER_HOST: "tcp://localhost:2375"
   DOCKER_OPTS: "--data-root=/mnt/volume/docker-data"
   DOCKER_MEMORY: "4g"
   DOCKER_CPUS: "2"
 
 build:
-  image: docker:latest
+  image: docker:dind
   services:
     - name: docker:dind
-      command: ["--tls=false", "--storage-driver=overlay2", "--mtu=1500", "--data-root=/mnt/volume"]
+      command: ["--host=tcp://0.0.0.0:2375", "--tls=false", "--storage-driver=overlay2", "--mtu=1500", "--data-root=/mnt/volume"]
   script:
     - echo "Building the Flask project"
     - docker build -t $DOCKER_REPO:flask .
 
 containerize:
-  image: docker:latest
+  image: docker:dind
   services:
     - docker:dind
   script: