Clarify the purpose of the website https://dotty.epfl.ch (#17529)

Relates to #15111

Author: julienrf

CONTRIBUTING.md

@@ -2,4 +2,4 @@
 
 Firstly, thanks for being willing to contribute to Dotty! Head on over the
 [Scala 3 Contributing
-Guide](https://docs.scala-lang.org/scala3/guides/contribution/contribution-intro.html), which should have all the info you're looking for.
+Guide](https://dotty.epfl.ch/docs/contributing/index.html), which should have all the info you're looking for.

docs/_blog/index.html

@@ -1,6 +1,6 @@
 ---
 layout: static-site-main
-title: Blog
+title: Blog (archive)
 ---
 <main class="container">
     <h1>{{ page.title }}</h1>

docs/_docs/contributing/architecture/phases.md

@@ -105,4 +105,4 @@ These map the transformed trees to Java classfiles or SJSIR files.
 [patternMatcher]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/transform/PatternMatcher.scala
 [erasure]: https://github.com/lampepfl/dotty/blob/master/compiler/src/dotty/tools/dotc/transform/Erasure.scala
 [Mirror]: https://github.com/lampepfl/dotty/blob/master/library/src/scala/deriving/Mirror.scala
-[PCP]: {{ site.scala3ref }}/metaprogramming/macros.html#the-phase-consistency-principle
+[PCP]: ../../reference/metaprogramming/macros.md#the-phase-consistency-principle

docs/_docs/contributing/getting-started.md

@@ -134,7 +134,7 @@ The main development discussion channels are:
 [java8]: https://www.oracle.com/java/technologies/javase-jdk8-downloads.html
 [java11]: https://www.oracle.com/java/technologies/javase-jdk11-downloads.html
 [adopt]: https://adoptopenjdk.net/
-[compat]: /overviews/jdk-compatibility/overview.html
+[compat]: https://docs.scala-lang.org/overviews/jdk-compatibility/overview.html
 [scala-cla]: https://www.lightbend.com/contribute/cla/scala
 [dotty-issue]: https://github.com/lampepfl/dotty/issues
 [dotty-discussion]: https://github.com/lampepfl/dotty/discussions

docs/_docs/contributing/index.md

@@ -19,9 +19,9 @@ if you notice anything out of date, or report any issues
 ### Get the Most from This Guide
 
 `dotc` is built with Scala 3, fully utilising its [new
-features](/scala3/new-in-scala3.html). It is recommended that you first have
+features](https://docs.scala-lang.org/scala3/new-in-scala3.html). It is recommended that you first have
 some familiarity with Scala 3 to get the most out of this guide. You can learn
-more in the [language reference]({{ site.scala3ref }}).
+more in the [language reference](../reference/overview.md).
 
 Many code snippets in this guide make use of shell commands (a line beginning
 with `$`), and in this case a `bash` compatible shell is assumed. You may have

docs/_docs/contributing/workflow.md

@@ -115,6 +115,8 @@ The basics of working with Dotty codebase are documented [here](https://dotty.ep
 | `testOnly dotty.tools.dotc.CompilationTests -- *pos` | Run test (method) `pos` from `CompilationTests` suite.                                                                        |
 | `testCompilation sample`                             | In all test suites, run test files containing the word `sample` in their title.                                               |
 | `scala3-compiler/Test/runMain dotty.tools.printTypes`|  Print types underlying representation                                                                                        |
+| `scaladoc/generateScalaDocumentation`                | Build the documentation website (published to https://dotty.epfl.ch)                                                          |
+| `scaladoc/generateReferenceDocumentation`            | Build the reference documentation website (published to https://docs.scala-lang.org/scala3/reference)                         |
 
 
 ## Shell Commands

docs/_docs/index.md

@@ -1,19 +1,6 @@
 ---
 layout: index
 redirectFrom: /docs/index.html
-nightlyOf: https://docs.scala-lang.org/scala3/reference/
 ---
 
-Dotty is the project name for technologies that are considered for inclusion in Scala 3. Scala has
-pioneered the fusion of object-oriented and functional programming in a typed setting. Scala 3 will
-be a big step towards realizing the full potential of these ideas. Its main objectives are to
-
-- become more opinionated by promoting programming idioms we found to work well,
-- simplify where possible,
-- eliminate inconsistencies and surprising behaviors,
-- build on strong foundations to ensure the design hangs well together,
-- consolidate language constructs to improve the language’s consistency, safety, ergonomics, and performance.
-
-In this documentation you will find information on how to use the Dotty compiler on your machine,
-navigate through the code, setup Dotty with your favorite IDE and more!
-
+This website contains the developer documentation of the Scala 3 compiler. It targets developers interested in contributing to the compiler, or learning its internals. If you want to learn how to use Scala, go [here](https://docs.scala-lang.org/).

docs/_docs/reference/metaprogramming/macros-spec.md

@@ -134,7 +134,7 @@ Quotes define all the `Expr[T]` methods as extension methods.
 `Type[T]` does not have methods and therefore does not appear here.
 These methods are available as long as `Quotes` is implicitly given in the current scope.
 
-The `Quotes` instance is also the entry point to the [reflection API](./refelction.md) through the `reflect` object.
+The `Quotes` instance is also the entry point to the [reflection API](./reflection.md) through the `reflect` object.
 
 Finally, `Quotes` provides the internal logic used in quote un-pickling (`QuoteUnpickler`) in quote pattern matching (`QuoteMatching`).
 These interfaces are added to the self-type of the trait to make sure they are implemented on this object but not visible to users of `Quotes`.