Add how-to document (#102)

* adds how-to for using the bookmarklet on Android/Chrome

* Polish how-to doc and reference from README.md

* Add how-to for creating share action in Safari

Co-authored-by: Sascha Ißbrücker <sascha.issbruecker@googlemail.com>

README.md

@@ -101,6 +101,10 @@ Check the [options document](docs/Options.md) on how to configure your linkding
 
 Check the [backups document](docs/backup.md) for options on how to create backups.
 
+## How To
+
+Check the [how-to document](docs/how-to.md) for tips and tricks around using linkding.
+
 ## API
 
 The application provides a REST API that can be used by 3rd party applications to manage bookmarks. Check the [API docs](docs/API.md) for further information.

docs/how-to.md

@@ -0,0 +1,46 @@
+# How To
+
+Collection of tips and tricks around using linkding.
+
+## Using the bookmarklet on Android/Chrome
+
+This how-to explains the usage of the standard linkding bookmarklet on Android / Chrome. 
+
+Chrome on Android does not permit running bookmarklets in the same way you can on a desktop system. There is however a workaround that is explained here.
+
+**Note** that this only works with Chrome and not with other browsers on Android.
+
+Create a bookmark of your linkding deployment by clicking the star icon which you find in the three dots menu in the top right. Next you have to edit the bookmark. Edit the URL and replace it it with the bookmarklet code of your instance and give it an easy to type name like `bm` for bookmark or `ld` for linkding:
+
+```
+javascript: (function() { var bookmarkUrl = window.location; var applicationUrl = 'http://<YOUR_INSTANCE_HERE>/bookmarks/new'; applicationUrl += '?url=' + encodeURIComponent(bookmarkUrl); applicationUrl += '&auto_close'; window.open(applicationUrl);})();
+```
+
+Now when you are browsing the web and you want to save the current page as a bookmark to your linkding instance simply type `bm` into the address bar and select it from the results. The bookmarklet code will trigger and you will be redirected so save the current page.
+
+For more info see here: https://paul.kinlan.me/use-bookmarklets-on-chrome-on-android/
+
+## Create a share action on iOS for adding bookmarks to linkding
+
+This how-to explains how to make use of the app shortcuts iOS app to create a share action that can be used in Safari for adding bookmarks to your linkding instance.
+
+**In the shortcuts app:**
+- create new shortcut
+- go to shortcut details, enable to option to show the shortcut in share menu
+- from the available share input types only select "URL"
+- add Safari action "Display website in Safari" (paraphrasing, not sure how it's called in english)
+- for URL enter your linkding instance URL and specifically point to the new bookmark form, then add the shortcut input variable from the list of suggested variables after the URL parameter. Visually it should look something like this: `https://linkding.mydomain.com/bookmarks/new?url=[Shortcut input]`, where `[Shortcut input]` is a visual block that was inserted after selecting the shortcut input variable suggestion. This is basically a placeholder that will get replaced with the actual URL that you want to bookmark. See screenshot at the end for an example on how this looks.
+- save, give the shortcut a nice name + glyph
+
+Example of how the shortcut configuration should look:
+
+![Screenshot](/docs/ios-app-shortcut-example.png?raw=true "Screenshot demonstrating how to insert the input placeholder into the URL")
+
+**Using the share action from Safari:**
+- browse to the website that you want to share
+- click the share button
+- your new app shortcut should now be available as share action
+- select the app shortcut
+- this should open a new Safari overlay showing the add bookmark form with the URL field prefilled
+- after saving the bookmark you can close the overlay and continue browsing
+