Support environment variables

[mzl980425]

• Cloudflare:

  export default {
    async fetch(request, env, ctx) {
      return new Response(`API host: ${env.API_HOST}`);
    },
  };
  
  // OR
  
  process.env.API_URL

• Deno Deploy:

  Deno.env.get("MY_ENV_VAR")
  Deno.env.toObject()

• Deno Deploy EA:

  Deno.env.get("MY_ENV_VAR")
  Deno.env.toObject()

• Netlify:

  • Functions:

    process.env.API_URL

  • Edge Functions:

    Netlify.env.get("MY_IMPORTANT_VARIABLE")
    Netlify.env.toObject()

• Vercel: Seems like:

  process.env.API_URL