chore: Support Github Codespaces (#2510)

Note: Update the ruby version 2.7.3. For production Linux VM, install 2.7.3 and follow the upgrade steps as shown in https://www.chatwoot.com/docs/self-hosted/deployment/linux-vm#upgrading-to-a-newer-version-of-chatwoot

.devcontainer/Dockerfile.base

@@ -0,0 +1,45 @@
+# pre-build stage
+ARG VARIANT=2.7
+FROM mcr.microsoft.com/vscode/devcontainers/ruby:${VARIANT}
+
+# Update args in docker-compose.yaml to set the UID/GID of the "vscode" user.
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+RUN if [ "$USER_GID" != "1000" ] || [ "$USER_UID" != "1000" ]; then \
+        groupmod --gid $USER_GID vscode \
+        && usermod --uid $USER_UID --gid $USER_GID vscode \
+        && chmod -R $USER_UID:$USER_GID /home/vscode; \
+    fi
+
+# [Option] Install Node.js
+ARG INSTALL_NODE="true"
+ARG NODE_VERSION="lts/*"
+RUN if [ "${INSTALL_NODE}" = "true" ]; then su vscode -c "source /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+  && apt-get -y install --no-install-recommends \
+    libssl-dev \
+    tar \
+    tzdata \
+    postgresql-client \
+    yarn \
+    git \
+    imagemagick \
+    tmux \
+    zsh
+
+
+# Install overmind
+RUN curl -L https://github.com/DarthSim/overmind/releases/download/v2.1.0/overmind-v2.1.0-linux-amd64.gz > overmind.gz \
+  && gunzip overmind.gz \
+  && sudo mv overmind /usr/local/bin \
+  && chmod +x /usr/local/bin/overmind 
+
+# Do the set up required for chatwoot app 
+WORKDIR /workspace
+COPY . /workspace
+RUN yarn
+
+COPY Gemfile Gemfile.lock ./
+RUN gem install bundler && bundle install
+