build: Setup release build process (#5605)

**Story card:**
[sc-15268](https://app.shortcut.com/simpledotorg/story/15268/versioning-adopt-semantic-versioning)

## Because

We want to release intentionally, following our versioning discussions.

This is part of the work we're undertaking to ensure Simple is a product
people can install themselves. Our releases have been bleeding edge for
the past seven years thereabouts. With releases, we are able to deliver
deterministically to our users.

## This addresses

Updating Semaphore instructions on the agreed way we want to deploy
releases

## Test instructions

n/a

Author: igbanam

.semaphore/deploy.yml

@@ -33,16 +33,16 @@ promotions:
   - name: Bangladesh Demo Deployment
     pipeline_file: bangladesh_demo_deployment.yml
     auto_promote:
-      when: (branch = 'master' AND result = 'passed') OR (tag =~ '^release-.*' AND result = 'passed')
+      when: (branch = '^release\/v\d{2}.*' AND result = 'passed')
   - name: Ethiopia Demo Deployment
     pipeline_file: ethiopia_demo_deployment.yml
     auto_promote:
-      when: (branch = 'master' AND result = 'passed') OR (tag =~ '^release-.*' AND result = 'passed')
+      when: (branch = '^release\/v\d{2}.*' AND result = 'passed')
   - name: Sri Lanka Demo Deployment
     pipeline_file: sri_lanka_demo_deployment.yml
     auto_promote:
-      when: (branch = 'master' AND result = 'passed') OR (tag =~ '^release-.*' AND result = 'passed')
+      when: (branch = '^release\/v\d{2}.*' AND result = 'passed')
   - name: India Production Deployment
     pipeline_file: india_production_deployment.yml
     auto_promote:
-      when: (branch = 'master' AND result = 'passed') OR (tag =~ '^release-.*' AND result = 'passed')
+      when: (branch = '^release\/v\d{2}.*' AND result = 'passed')

.semaphore/docker.yml

@@ -12,6 +12,7 @@ blocks:
           - tag_git_sha="$image_name:$SEMAPHORE_GIT_SHA"
           - echo $DOCKER_PASSWORD | docker login --username "$DOCKER_USERNAME" --password-stdin
           - docker build -t $tag_latest -t $tag_git_sha -f .docker/prod.Dockerfile  .
+          - docker tag $tag_latest "$image_name:${SEMAPHORE_WORKFLOW_ID}"
           - docker images
           - docker push $tag_latest
           - docker push $tag_git_sha

.semaphore/semaphore.yml

@@ -26,6 +26,8 @@ blocks:
             - yarn install
             - cache store
   - name: Tests
+    skip:
+      when: change_in(['/doc', '/swagger', '**/*.md', '/public', '/script'])
     task:
       env_vars:
         - name: RAILS_ENV