diff --git a/.dev.vars.example b/.dev.vars.example
new file mode 100644
index 00000000..f52b91d7
--- /dev/null
+++ b/.dev.vars.example
@@ -0,0 +1,4 @@
+TURNSTILE_SECRET_KEY=xxxxxx
+MY_CUSTOM_EMAIL_ADDRESS=xxxxxx@xxxxxx.xxx
+RESEND_API_KEY=xxxxxx
+LOCAL_DB_PATH=.wrangler\\state\\v3\\d1\\miniflare-D1DatabaseObject\\xxxxxx.sqlite
diff --git a/.env.example b/.env.example
new file mode 100644
index 00000000..a2f50392
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,5 @@
+UNSPLASH_API_ACCESS_KEY=xxxxxx
+PUBLIC_TURNSTILE_SITE_KEY=xxxxxx
+CLOUDFLARE_ACCOUNT_ID=xxxxxx
+D1_DB_ID=xxxxxx
+D1_DB_API_TOKEN=xxxxxx
diff --git a/README.md b/README.md
index 852c2c48..68806993 100644
--- a/README.md
+++ b/README.md
@@ -50,8 +50,12 @@ A website where Nagi, just another engineer & creator, posts his work and writin
   - [Textlint](https://textlint.github.io/): The pluggable linting tool for text and markdown
 - **Git hooks manager:**
   - [Lefthook](https://github.com/evilmartians/lefthook): A polyglot Git hooks manager
+- **Email sender:**
+  - [Resend](https://resend.com/docs/introduction): A simple email API for developers
 
-## Ready, set, go!
+## Ready, Set, Go!
+
+This section is a memo for myself assuming there are other project members or contributers.
 
 ### Prerequisites
 
@@ -59,3 +63,63 @@ You need to:
 
 - install [VSCode](https://code.visualstudio.com/) on your local machine
 - install [the Remote Development extension](https://github.com/Microsoft/vscode-remote-release) in your VSCode editor
+
+> [!IMPORTANT]
+> You can also start coding without them, but need to install required packages and libraries in your local in that case.
+
+### The Dev Workflow
+
+This project adopts Issue-driven Development.
+
+> [!NOTE]
+> Issue-driven Development is a dev process where:
+> - developers are always supposed to create a Github issue first whenever starting coding
+> - issues are associated with specific branches one-to-one, in which development proceeds
+> - After peer code reviews and passing your team's conventional rules, changes are finally merged into the main branch
+
+1. On [the issue page](https://github.com/brklntmhwk/younagi.dev/issues), create an issue
+    - Preferably add a label that matches the purpose of your issue
+    - In your issue, clarify the following points
+        - The purpose
+        - As-is
+        - To-be
+2. Select "Create a branch for this issue or link a pull request" to create a branch for your issue
+    - e.g., "18-refine-readme" for an issue #18 to refine the README doc
+3. In your local dev environment, execute `git switch -c [[the branch name]]`
+    - If you haven't had a clone of this project, execute `git clone https://github.com/brklntmhwk/younagi.dev.git` first
+        - In a real project run by a team, fork this project first via [the Github repo](https://github.com/brklntmhwk/younagi.dev) and then clone it
+    - Hereafter, you're supposed to be at the project root
+4. Execute `git pull origin [[the branch name]]` to keep your local up to date
+5. Start coding!
+    1. [Setup](#setup-for-coding)
+    2. Open the VSCode command palette
+    3. Select "Dev Containers: Reopen Container"
+        - It starts rebuilding the container if needed
+        - It might take longer the first time
+    4. [Setup](#setup-for-coding)
+6. After you're finished coding, execute `git add .` > `git cz`, add commit info answering prompts, and then execute `git push origin [[the branch name]]`
+7. Go to [the project's repo](https://github.com/brklntmhwk/younagi.dev) and create a pull request for changes you've made
+    - The title of pull requests must be in this format: `<type>(<scope>): detailed descriptions here...`
+      - Check the changelog config or dangerfile for allowed types & scopes
+      - e.g., "feat(ui): 🆕 add a likes button"
+    - In your pull request, clarify the following points:
+      - Changes
+      - Checklist
+8. Fix your code over the course of peer code review on an as-needed basis
+    - Once the whole team gives you the green light, changes you've made will be merged into the main branch
+9. Confirm if the merge is done without any problem and then delete the remote branch from [this page](https://github.com/brklntmhwk/younagi.dev/branches)
+    - Execute `git switch main` > `git branch -d [[the branch name]]` to delete the one in local
+
+### Setup for coding
+
+#### Outside the container
+
+1. Create `.env` and `.env.vars` at the root
+    - see `.env.example` and `.env.vars.example` for reference, respectively
+    - At this moment, you can't set the `LOCAL_DB_PATH` var yet
+
+#### Inside the container
+
+1. Set the `LOCAL_DB_PATH` var looking up the dir ".wrangler/state/v3/d1/miniflare-D1DatabaseObject/"
+2. Run `bun dev --host` to start the dev server
+3. Go to "http://localhost:4321/"