Added tools folder

- Moved providers scrapper by @Teifun2 into tool folder
- Added code generator for avoid the use of env variables (wip)

tools/dns_challenge_update/providers-scraper-util.js

@@ -0,0 +1,45 @@
+// This script is used to scrape the DNS providers from the https://go-acme.github.io/lego/dns/ website
+// It will fetch the DNS providers and their respective codes and store them in a Map object
+// You can copy the code into the browser console and run it to get the Map object
+// Dont forget to remove providers that are not supported by the current acme-lego version that is being used
+
+const providerArray = [];
+document.querySelectorAll('table a[href^="/lego/dns/"]').forEach((provider) => {
+    fetch(provider.href)
+        .then(function(response) { return response.text() })
+        .then(function(html) {
+            const parser = new DOMParser();
+            const doc = parser.parseFromString(html, "text/html")
+
+            const providerCodes = Array.from(doc.querySelector('table tbody').querySelectorAll('code')).map(code => code.innerHTML);
+            const providerId = provider.href.match(/.*?\/dns\/(.*?)\//)[1];
+            const providerName = provider.innerHTML;
+            providerArray.push({providerId, providerName, providerCodes});
+        })
+        .catch(function(err) {  
+            console.log('Failed to fetch page '+provider.href+': ', err);  
+        });
+})
+
+// After fetching all the providers, sort them by providerName. You have to run this line in the console after the fetch is done
+
+providerArray.sort((a,b) => a.providerName.localeCompare(b.providerName))
+
+
+// Create Dropdown items for the providers
+
+providerDropdownItems = "";
+providerArray.forEach(provider => {
+    providerDropdownItems += '<div class="item" data-value="'+provider.providerId+'">'+provider.providerName+'</div>\n'
+})
+console.log(providerDropdownItems);
+
+
+// Create Credential prefill for the providers
+
+switchCasePrefill = "";
+providerArray.forEach(provider => {
+    providerCodes = provider.providerCodes.reduce((accumulator,value) => accumulator + value + "=\\n","").slice(0, -2);
+    switchCasePrefill += 'case "'+provider.providerId+'":\n\t$("#dnsCredentials").val("'+providerCodes+'");\n\tbreak;\n'
+})
+console.log(switchCasePrefill);