Optimizes the Docker build, reducing the build time from 6 minutes to ~2.5 minutes (58% reduction).

[maneeshaxyz]

📌 Description

• Closes [BUG] Building Raven image takes a lot of time #189

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🔍 Changes Made

• Removed -a from build and moved all build commands into one docker command.
• Moved entrypoint in /script/entrypoint.sh

✅ Checklist (Email System)

• Core IMAP commands tested (LOGIN, CAPABILITY, LIST, SELECT, FETCH, LOGOUT).
• Authentication is tested.
• Docker build & run validated.
• Configuration loading verified for default and custom paths.
• Persistent storage with Docker volume verified.
• Error handling and logging verified
• Documentation updated (README, config samples).

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🧪 Testing Instructions

time docker build --pull --no-cache -t raven .

To test the server, use the instructions in the README in the test directory.

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⚠️ Notes for Reviewers