Update config.yml

[skip ci]

Author: Gunasekar-K

.circleci/config.yml

@@ -1,18 +1,14 @@
 version: 2
 defaults: &defaults
-    docker:
-      - image: docker:18.06.0-ce-git
+  docker:
+    - image: circleci/python:2.7-stretch-browsers
 install_dependency: &install_dependency
           name: Installation of build and deployment dependencies.
           command: |
-            apk update
-            apk add --no-cache bash
-            apk add --no-cache jq py-pip sudo curl gcc python-dev musl-dev libffi-dev make openssl-dev
-            apk upgrade
-            pip install --upgrade pip
+            sudo apt install jq
             sudo pip install awscli --upgrade
-            sudo curl -o /usr/local/bin/ecs-cli https://s3.amazonaws.com/amazon-ecs-cli/ecs-cli-linux-amd64-latest
             sudo pip install docker-compose
+            sudo curl -o /usr/local/bin/ecs-cli https://s3.amazonaws.com/amazon-ecs-cli/ecs-cli-linux-amd64-latest
             sudo chmod +x /usr/local/bin/ecs-cli
             
 install_deploysuite: &install_deploysuite
@@ -22,7 +18,6 @@ install_deploysuite: &install_deploysuite
             cp ./../buildscript/master_deploy.sh .
             cp ./../buildscript/buildenv.sh .
             cp ./../buildscript/awsconfiguration.sh .
-
 run_build: &run_build
           name: Installation of build dependencies.
           command: ./build.sh            
@@ -65,7 +60,6 @@ jobs:
             ./buildenv.sh -e PROD -b submission-processor-es_deployvar
             source buildenvvar
             ./master_deploy.sh -d ECS -e PROD -t latest -s prod-global-appvar,submission-processor-es_appvar -i submission-processor-es
-
 workflows:
   version: 2
   build:
@@ -80,4 +74,4 @@ workflows:
           context : org-global
           filters:
             branches:
-              only: master        
+              only: master