doc: moved docker instructions to main README

src/main/kotlin/eu/fosil/okupamicoche/Main.kt

@@ -24,7 +24,7 @@ suspend fun main() {
         matrixApplicationServiceApiServer(
             hsToken = config.tokens.homeserver,
             applicationServiceApiServerHandler = createAppService(matrixApiClient),
-            customMappings = TravelEventContentSerializerMappings()
+            customMappings = TravelEventContentSerializerMappings
         )
     }.start(wait = true)
 

src/main/kotlin/eu/fosil/okupamicoche/matrix/event/TravelEventContentSerializerMappings.kt

@@ -5,7 +5,7 @@ import net.folivo.trixnity.core.model.events.StateEventContent
 import net.folivo.trixnity.core.serialization.events.BaseEventContentSerializerMappings
 import net.folivo.trixnity.core.serialization.events.EventContentSerializerMapping
 
-class TravelEventContentSerializerMappings : BaseEventContentSerializerMappings() {
+object TravelEventContentSerializerMappings : BaseEventContentSerializerMappings() {
     override val message: Set<EventContentSerializerMapping<out MessageEventContent>> = setOf(
         EventContentSerializerMapping.of<TravelCreatedMessageEventContent>(TRAVEL_CREATED_MESSAGE_EVENT_TYPE)
     )

src/main/kotlin/eu/fosil/okupamicoche/matrix/matrixApiClient.kt

@@ -19,7 +19,7 @@ val matrixApiClient = if (config == null) null else MatrixClientServerApiClient(
         (if (config.homeserver.secure) "https" else "http") +
                 "://${config.homeserver.host}:${config.homeserver.port}"
     ),
-    eventContentSerializerMappings = createEventContentSerializerMappings(TravelEventContentSerializerMappings())
+    eventContentSerializerMappings = createEventContentSerializerMappings(TravelEventContentSerializerMappings)
 ).apply { accessToken.value = config.tokens.appService }
 
 object MatrixApiClient {