Rewrote your local build instructions!

[NuclearMachine]

Hey! Thought your local build instructions could use some help. It's bloated and filled with sections that could lead to errors. It's also missing a bunch of pre-requisites which might derail newcomers.

• The recommended version isn't listed anywhere (2.7.6). The application or rails console will not start if the ruby version is v3 and above (NameError: uninitialized class variable @@schemes in URI).
• Most users will encounter a mimemagic build error while bundling and there are no notes for this.
• Prepending DATABASE_ADAPTER=postgresql in every shell command is unnecessary. The user should update this variable directly from the .env file along with the DB username and password. Also, if the user prepends the command and disregards updating .env, the application will fail to start as .env defaults to mysql.
• There should be a section for updating the database username and password for .env.

I've simplified the local build instructions. Let me know what you guys think!

I believe these changes will help your users especially newbies who might be looking to use Huginn!

[NuclearMachine]

I also suggest that you guys add a .ruby-version for managers like rbenv to auto-set the ruby version.

[virtadpt]

It looks great to me. The new isntructions definitely line up with my own notes.