fix: drop CSP support from the exported version (#795)

[skip ci]

README.md

@@ -83,8 +83,10 @@ You can export Pinafore as a static site. Run:
     npm run export
 
 Static files will be written to `__sapper__/export`.
-Be sure to add the [CSP](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) header printed out in the console to
+
-your server config!
+Note that this is not the recommended method, because
+[CSP](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) headers are not 
+currently supported for the exported version.
 
 ## Developing and testing
 

bin/print-export-info.js

@@ -1,15 +1,3 @@
-const fs = require('fs')
-const path = require('path')
-
-const checksum = require('../inline-script-checksum').checksum
-const html = fs.readFileSync(path.join(__dirname, '../__sapper__/export/index.html'), 'utf8')
-const nonce = html.match(/<script nonce=([^>]+)>/)[1]
-
-const csp = `add_header Content-Security-Policy "script-src 'self' 'sha256-${checksum}' 'nonce-${nonce}'; ` +
-`worker-src 'self'; style-src 'self' 'unsafe-inline'; frame-src 'none'; object-src 'none'; manifest-src 'self';`
-
-fs.writeFileSync(path.join(__dirname, '../__sapper__/export/.csp.nginx'), csp, 'utf8')
-
 console.log(`                                                                                             
 
                ,((*
@@ -36,13 +24,5 @@ Export successful! Static files are in:
 
     __sapper__/export/
 
-Be sure to add the CSP header to your nginx config:
-
-    server {
-        include ${path.resolve(__dirname, '..')}/__sapper__/export/.csp.nginx;
-    }
-
-This file will be updated whenever you do \`npm run export\`.
-
 Enjoy Pinafore!
 `)