Updated challenges showing off dojo features

world/earth/.init

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+#!/opt/pwn.college/python
+
+import pathlib
+
+dir = pathlib.Path(__file__).parent
+planets = (dir / "planets.txt").read_text().strip().splitlines()
+
+for planet in planets:
+    planet_path = dir / planet.lower()
+    planet_path.write_text(planet)

world/earth/README.md

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+# world
+## earth
+
+This challenge is named `earth`, and is located within module `world`.
+
+When users start this challenge, their environment will have:
+- `/flag`
+- `/challenge/earth`
+- `/challenge/planets.txt`
+- `/chalenge/.init`
+
+Symbolic links which are relative to the dojo root-directory are supported.
+
+When a challenge starts, and before users have access to their environment, `.init` will automatically be run as the root user.

world/earth/earth

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+#!/opt/pwn.college/python
+
+with open("/flag") as f:
+    print(f.read())

world/earth/planets.txt

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+../planets.txt