General development process

- new cog commands
- new voice cog
- new requirements.txt
- adjusted readme
- added Dockerfile for faster deployment (still WIP)
- other general things

cogs/voice.py

@@ -0,0 +1,76 @@
+"""
+Make Aqua be able to join voice channel and play audio:
+    - join
+    - leave
+    - play
+
+https://discordpy.readthedocs.io/en/latest/ext/commands/cogs.html
+"""
+
+# IMPORTS
+import discord
+from discord.ext import commands
+from discord.utils import get
+
+# COG INIT
+class Voice(commands.Cog):
+    def __init__(self, bot):
+        self.bot = bot
+
+# COG BODY
+    @commands.command(name="join", aliases=["j"])
+    @commands.guild_only()
+        async def join(self, ctx):
+            """
+            Tries to join the author's current voice channel
+            """
+            channel = ctx.message.author.voice.channel
+            if not channel:
+                ctx.send:("You're not connected to a voice channel!")
+                return
+
+            voice = get(bot.voice_clients, guild=ctx.guild)
+
+            if voice and voice.is_connected():
+                await voice.move_to(channel)
+            else:
+                voice = await channel.connect()
+                await ctx.send(f"`Joined {channel}!`")
+""" useless?
+            await voice.disconnect()
+
+            if voice and voice.is_connected():
+                await voice.move_to(channel)
+            else:
+                voice = await channel.connect()
+            await ctx.send(f"`Joined {channel}!`")
+"""
+
+    @commands.command(name="leave", aliases=["quit, l"])
+    @commands.guild_only()
+        async def leave(self, ctx):
+            """
+            Leaves the voice channel, if connected
+            """
+            channel = ctx.message.author.voice.channel
+            voice = get(bot.voice_clients, guild=ctx.guild)
+
+            if voice and voice.is_connected():
+                await voice.disconnect()
+                await ctx.send(f"`Left {channel}!`")
+            else:
+                ctx.send("I'm not connected to a channel!")
+
+    @commands.command(name="play", aliases=["p"])
+    @commands.guild_only()
+        async def play(self, ctx, url: str):
+            """
+            Plays music from YT link specifies
+            """
+            # TODO
+            ctx.send("This module is not working yet!")
+
+
+# COG ENDING
+def setup(bot):
+    bot.add_cog(Voice(bot))