Add github workflows

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Report a bug
+about: Report incorrect or unexpected behavior.
+title: ''
+labels: bug
+assignees: adamkrellenstein
+
+---
+
+**Describe the Problem**
+A clear and concise description of what the problem is. What was the expected behavior?
+
+**Steps To Reproduce**
+Steps to reproduce the behavior:
+1. ...
+
+**Screenshots and Logfiles**
+If applicable, upload screenshots and logfiles to help explain your problem. Please run everything with the `--verbose` flag when possible.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Request a feature
+about: Suggest an improvement!
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/build_docker_image.yml

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+name: Build Docker Image
+
+on:
+  push:
+    branches: "**"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install Docker
+      run: |
+        curl -fsSL https://get.docker.com -o get-docker.sh
+        sudo sh get-docker.sh
+    - name: Build image
+      run: |
+        docker build -t addrindexrs .
+    - name: Test image
+      run: |
+        docker run --rm addrindexrs -h

.github/workflows/publish_docker_image.yml

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+name: Publish Docker Image
+
+on:
+  release:
+    types: [published]
+
+env:
+  DOCKER_REPO: counterparty/addrindexrs
+  DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+  DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install Docker
+      run: |
+        curl -fsSL https://get.docker.com -o get-docker.sh
+        sudo sh get-docker.sh
+    - name: Build, tag, login and push image
+      run: |
+        export VERSION=v$(cat Cargo.toml | grep '^version =' | awk -F '"' '{print $2}')
+        docker build -t $DOCKER_REPO:$VERSION .
+        docker tag $DOCKER_REPO:$VERSION $DOCKER_REPO:latest
+        docker login -u "$DOCKER_USERNAME" -p "$DOCKER_PASSWORD"
+        docker push $DOCKER_REPO:$VERSION
+        docker push $DOCKER_REPO:latest