Update database support docs

* Raise supported versions for PostgreSQL and SQL Server to non-EOL versions
* Add notice about deprecation of RDBMSes other than PostgreSQL in DT v5

Signed-off-by: nscuro <nscuro@protonmail.com>

docs/_docs/getting-started/configuration.md

@@ -115,6 +115,11 @@ alpine.database.username=sa
 # Specifies the password to use when authenticating to the database.
 # alpine.database.password=
 
+# Optional
+# Specifies a path to the file holding the database password.
+# To be used as alternative to alpine.database.password.
+# alpine.database.password.file=
+
 # Optional
 # Specifies if the database connection pool is enabled.
 alpine.database.pool.enabled=true

docs/_docs/getting-started/database-support.md

@@ -14,15 +14,19 @@ Dependency-Track supports the following database servers:
 
 | RDBMS | Supported Versions | Recommended |
 |:---------------------|:-------------------|:------------|
-| PostgreSQL | >= 9.0  | ✅ |
-| Microsoft SQL Server | >= 2012 | ✅  |
+| PostgreSQL | >= 12.0 | ✅ |
+| Microsoft SQL Server | >= 2017 | ⚠️ |
 | MySQL | 5.6 - 5.7 | ❌ |
 
 Dependency-Track requires extensive unicode support, which is not provided per default in MySQL.
 Both PostgreSQL and SQL Server have been proven to work very well in production deployments, while
 MySQL / MariaDB can require [lots of extra care](https://github.com/DependencyTrack/dependency-track/issues/271#issuecomment-1108923693). 
 **Only use MySQL if you know what you're doing**!
 
+> Support for H2, Microsoft SQL Server, and MySQL will be dropped in Dependency-Track v5.
+> From then onwards, the project will focus on PostgreSQL. When setting up a new instance
+> of Dependency-Track v4.x, consider using PostgreSQL.
+
 Refer to the [Configuration] documentation for how database settings may be changed.
 
 ### Examples

src/main/resources/application.properties

@@ -81,6 +81,11 @@ alpine.database.username=sa
 # Specifies the password to use when authenticating to the database.
 # alpine.database.password=
 
+# Optional
+# Specifies a path to the file holding the database password.
+# To be used as alternative to alpine.database.password.
+# alpine.database.password.file=
+
 # Optional
 # Specifies if the database connection pool is enabled.
 alpine.database.pool.enabled=true