Initial PostgreSQL support

[bvp]

No description provided.

[RadhiFadlillah]

Hey, thanks !

[bvp]

Thank you ;)
Need to update wiki

[nfam]

Hi @bvp, thank you for PostgreSQL support. I love this DB.
However I could not view an individual bookmark (eg. Bookmark not found). Reviewing func (db *PGDatabase) GetBookmark() in the file shiori/internal/database/pg.go, I found SQL syntax error.

SELECT
	id, url, title, excerpt, author, public, 
	content, html, modified, content <> "" has_content
FROM bookmark WHERE id = $1

I think it should be single quote '' instead of double route "", so it should be

SELECT
	id, url, title, excerpt, author, public, 
	content, html, modified, content <> '' has_content
FROM bookmark WHERE id = $1

[RadhiFadlillah]

@nfam nice catch, thanks. It has been fixed in 9ba9d1e.