chore(doc): add readme file

.env

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+WRSR_DATABASE_NAME="wsrs"
+WRSR_DATABASE_USER="postgres"
+WRSR_DATABASE_PASSWORD="123456789"
+WRSR_DATABASE_PORT=5432
+WRSR_DATABASE_HOST="localhost"

README.md

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+# Introduction
+
+This project aims to create a AMA style page using `react` on frontend and `go` on backend.
+
+## Initialize project
+
+```bash
+$ go mod init forgejo.home.viniciussouza.me/learning/go-react-server
+```
+
+## Database migrations
+
+### Installing tern
+
+```bash
+$ go install github.com/jackc/tern/v2@latest
+```
+
+### Creating migrations
+
+```bash
+$ tern new --migrations ./internal/store/pgstore/migrations create_rooms_table
+$ tern new --migrations ./internal/store/pgstore/migrations create_messages_table
+```

compose.yml

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+services:
+  db:
+    image: postgres:latest
+    restart: unless-stopped
+    ports:
+      - ${WRSR_DATABASE_PORT:-5432}:5432
+    environment:
+      POSTGRES_USER: ${WRSR_DATABASE_USER}
+      POSTGRES_PASSWORD: ${WRSR_DATABASE_PASSWORD}
+      POSTGRES_DB: ${WRSR_DATABASE_NAME}
+    volumes:
+      - db:/var/lib/postgresql/data
+
+  pgadmin:
+    image: dpage/pgadmin4:latest
+    restart: unless-stopped
+    depends_on:
+      - db
+    ports:
+      - 8081:80
+    environment:
+      PGADMIN_DEFAULT_EMAIL: admin@admin.com
+      PGADMIN_DEFAULT_PASSWORD: password
+    volumes:
+      - pgadmin:/var/lib/pgadmin
+
+volumes:
+  db:
+    driver: local
+  pgadmin:
+    driver: local