Add integrations anchor and preliminary framework integrations to docs

docs/integrations/frameworks/django.mdx

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+---
+title: "Django"
+---
+
+Instructions coming soon.

docs/integrations/frameworks/express.mdx

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+---
+title: "Express, Fastify, Koa"
+---
+
+Prerequisite: [Install the CLI](/cli/overview)
+
+The steps apply to the following non-exhaustive list of frameworks:
+
+- [Express](https://expressjs.com)
+- [Fastify](https://www.fastify.io)
+- [Koa](https://koajs.com)
+
+## Initialize Infisical for your app
+
+```bash
+# move to your app
+cd /path/to/project
+
+# initialize infisical
+infisical init
+```
+
+## Modify the start script in your `package.json`
+
+```json
+...
+"scripts": {
+    "start": "infisical run -- node index.js"
+    "dev": "infisical run -- nodemon index.js" // if using nodemon for dev
+}
+...
+```
+
+## Start your server with environment variables injected
+
+```bash
+npm run start
+
+# or start development server
+
+npm run dev
+```

docs/integrations/frameworks/flask.mdx

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+---
+title: "Flask"
+---
+
+Prerequisite: [Install the CLI](/cli/overview)
+
+## Initialize Infisical for your [Flask](https://flask.palletsprojects.com/en/2.2.x) app
+
+```bash
+# move to your Flask app
+cd /path/to/project
+
+# initialize infisical
+infisical init
+```
+
+## Start your server with environment variables injected
+
+```bash
+infisical run -- flask run
+```

docs/integrations/frameworks/gatsby.mdx

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+---
+title: "Gatsby"
+---
+
+Prerequisite: [Install the CLI](/cli/overview)
+
+## Initialize Infisical for your [Gatsby](https://www.gatsbyjs.com) app
+
+```bash
+# move to your app
+cd /path/to/project
+
+# initialize infisical
+infisical init
+```
+
+## Modify the start script in your `package.json`
+
+```json
+...
+"scripts": {
+    "develop": "infisical run -- gatsby develop",
+    "start": "infisical run -- gatsby develop",
+    "build": "infisical run -- gatsby build",
+    "serve": "infisical run -- gatsby serve",
+    "clean": "infisical run -- gatsby clean"
+}
+...
+```
+
+## Start your server with environment variables injected
+
+```bash
+yarn run start
+
+# or start development server
+
+yarn run develop
+```

docs/integrations/frameworks/laravel.mdx

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+---
+title: "Laravel"
+---
+
+Instructions coming soon.

docs/integrations/frameworks/nestjs.mdx

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+---
+title: "NestJS"
+---
+
+Prerequisite: [Install the CLI](/cli/overview)
+
+## Initialize Infisical for your [NestJS](https://nestjs.com) app
+
+```bash
+# move to your Next.js app
+cd /path/to/project
+
+# initialize infisical
+infisical init
+```
+
+## Modify the start script in your `package.json`
+
+```json
+...
+"scripts": {
+    "prebuild": "rimraf dist",
+    "build": "nest build",
+    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
+    "start": "infisical run -- nest start",
+    "start:dev": "infisical run -- nest start --watch",
+    "start:debug": "nest start --debug --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:cov": "jest --coverage",
+    "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
+    "test:e2e": "jest --config ./test/jest-e2e.json"
+}
+...
+```
+
+## Start your server with environment variables injected
+
+```bash
+npm run start
+
+# or start development server
+
+npm run start:dev
+```

docs/integrations/frameworks/nextjs.mdx

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+---
+title: "Next.js"
+---
+
+Prerequisite: [Install the CLI](/cli/overview)
+
+## Initialize Infisical for your [Next.js](https://nextjs.org)
+
+```bash
+# move to your Next.js app
+cd /path/to/project
+
+# initialize infisical
+infisical init
+```
+
+## Modify the start script in your `package.json`
+
+```json
+...
+"scripts": {
+    "dev": "infisical run -- next dev",
+    "build": "infisical run -- next build",
+    "start": "infisical run -- next start"
+}
+...
+```
+
+## Start your server with environment variables injected
+
+```bash
+yarn run dev
+
+# or
+
+npm run dev
+```

docs/integrations/frameworks/rails.mdx

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+---
+title: "Ruby on Rails"
+---
+
+Instructions coming soon.

docs/integrations/frameworks/react.mdx

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+---
+title: "React"
+---
+
+Prerequisite: [Install the CLI](/cli/overview)
+
+## Initialize Infisical for your [Create React App](https://create-react-app.dev)
+
+```bash
+# move to your React app
+cd /path/to/project
+
+# initialize infisical
+infisical init
+```
+
+## Modify the start script in your `package.json`
+
+```json
+...
+"scripts": {
+    "start": "infisical run -- react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+}
+...
+```
+
+## Start your server with environment variables injected
+
+```bash
+yarn start
+```

docs/integrations/frameworks/remix.mdx

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+---
+title: "Remix"
+---
+
+Instructions coming soon.