chore: create Gitpod configuration

.dockerignore

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+/node_modules
+/config.js
+/coverage
+/dist
+/tmp
+.DS_Store
+.cache
+/*.log
+/.idea
+/package-lock.json
+*.pyc
+renovate-0.0.0-semantic-release.tgz
+/test/e2e/node_modules
+.eslintcache
+junit.xml
+/test-results
+renovate-schema.json
+**/gradle-wrapper/__fixtures__/**/.gradle
+.clinic/
+
+# generated code
+**/*.generated.ts
+tools/dist
+test/datasource/nuget/_fixtures/obj
+
+# testing
+/docker-compose.yml

.gitpod.Dockerfile

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+FROM gitpod/workspace-full
+
+# Install latest version of Git
+
+RUN sudo apt-get update && sudo apt-get install -y \
+    git \
+    && sudo rm -rf /var/lib/apt/lists/*
+
+# Install Java OpenJDK
+
+RUN bash -c ". /home/gitpod/.sdkman/bin/sdkman-init.sh && sdk update && sdk install java 11.0.12-open"
+
+# Install Node.js and use it
+
+RUN bash -c ". .nvm/nvm.sh && nvm install 14.18.1 && nvm use 14.18.1 && nvm alias default 14.18.1"
+
+RUN echo "nvm use default &>/dev/null" >> ~/.bashrc.d/51-nvm-fix
+
+# Install Python
+
+RUN bash -c "pyenv update && pyenv install 3.9.7 && pyenv global 3.9.7"

.gitpod.yml

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+image:
+  file: .gitpod.Dockerfile
+
+tasks:
+  - init: |
+      yarn install
+      yarn build
+
+vscode:
+  extensions:
+    - editorconfig.editorconfig
+    - dbaeumer.vscode-eslint
+    - github.vscode-pull-request-github
+    - esbenp.prettier-vscode