added Overleaf and corrected examples

README.md

@@ -54,6 +54,8 @@ results in:
 
 ![train on a track](https://raw.githubusercontent.com/railtoolkit/tikz-trackschematic/master/doc/symbology/symbols_png/train_direction_forward.png "train on a track")
 
+The library can also be used in [Overleaf](https://www.overleaf.com/read/crrxfcdzbhbd).
+
 ------------
 
 # Symbology and meaning

doc/examples/minimal_working_example.tex

@@ -0,0 +1,19 @@
+\documentclass{standalone} % LaTeX
+\usepackage{tikz-trackschematic} % loading the library
+
+\begin{document}
+  \begin{tikzpicture}
+
+    % TikZ command: specify coordinates
+    \coordinate (A)   at (0,0);
+    \coordinate (B)   at (6,0);
+    \coordinate (T)   at (5,0);
+
+    % draw a track
+    \maintrack (A) -- (B);
+
+    % place a train on the track
+    \train[forward] at (T) label ();
+
+  \end{tikzpicture}
+\end{document}

doc/examples/station_berg.tex

@@ -4,7 +4,7 @@
 % Permission to use, copy, modify, and/or distribute this file for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
 
 \documentclass[tikz,border=2]{standalone}
-\usetikzlibrary{trackschematic}
+\usepackage{tikz-trackschematic} % loading the library
 
 \begin{document}
   \begin{tikzpicture}[font=\sffamily]

doc/examples/station_chamstadt.tex

@@ -4,7 +4,7 @@
 % Permission to use, copy, modify, and/or distribute this file for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
 
 \documentclass[tikz,border=2]{standalone}
-\usetikzlibrary{trackschematic}
+\usepackage{tikz-trackschematic} % loading the library
 
 \begin{document}
   \begin{tikzpicture}[font=\sffamily]