Minor syntax mistakes corrected to build documentation correctly

docs/src/01_introduction_and_goals.adoc

@@ -44,6 +44,7 @@ See https://docs.arc42.org/section-1/[Introduction and Goals] in the arc42 docum
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 The functional requirements are the following:
+
 * The application must be accesible through the web
 * Users must be able to register into the system
 * Users must be able to see data about their past games (score, correct/wrong answers, number of questions answered...)

docs/src/04_solution_strategy.adoc

@@ -3,6 +3,7 @@ ifndef::imagesdir[:imagesdir: ../images]
 [[section-solution-strategy]]
 == Solution Strategy
 The web application is based on MERN stack, a full-stack combination of technologies for developing JavaScript applications fast.
+
 * *Node:* the JavaScript runtime environment.
 * *MongoDB:* chosen technology for the persistance of the system, that provides a non-relational database approach.
 * *Express and Node:* they make up the middle tier of the application, providing a powerful server platform.
@@ -11,6 +12,7 @@ The web application is based on MERN stack, a full-stack combination of technolo
 Regarding the deployment of the application, the strategy chosen is a *cloud-based* system. This decision was motivated because of the nature of
 the project, since a web application needs to be live and accesible at any moment.
 The server will be an ARM *Linux VM on Oracle*, where some *dockerized microservices* will be deployed:
+
 * users service
 * authentication service
 * questions service

docs/src/06_runtime_view.adoc

@@ -35,7 +35,7 @@ GW -> WEBC: Send category statistics
 * An overview of the runtime scenario of a game.
 
 [plantuml, "playing_diagram", png]
----
+----
 actor User
 entity WEBC as "Web Client"
 entity GW as "Gateway"
@@ -57,7 +57,7 @@ QU -> USERS: Update user points
 USERS -> DB: Modify user data
 QU -> GW: Send result and new question
 GW -> WEBC: Send result and new question
----
+----
 
 [role="arc42help"]
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