Adding permissions tag for Github Actions workflows (#4)

Author: alex-ilgayev

.github/workflows/docker-image-dev.yml

@@ -2,6 +2,9 @@ on:
   push:
     branches: dev
 
+permissions:
+  contents: read
+
 jobs:
   main:
     runs-on: ubuntu-latest

.github/workflows/docker-image.yml

@@ -1,6 +1,10 @@
 on:
   workflow_dispatch:
 
+permissions:
+  # Write permission needed for creating a tag.
+  contents: write
+
 jobs:
   main:
     runs-on: ubuntu-latest

.github/workflows/python-publish.yml

@@ -7,6 +7,9 @@ on:
   release:
     types: [created]
 
+permissions:
+  contents: read
+
 jobs:
   deploy:
 

.github/workflows/tests.yml

@@ -2,6 +2,9 @@ name: Unit Tests
 
 on: [push]
 
+permissions:
+  contents: read
+
 jobs:
   deploy: