!! Set a default font and font size as below:
*.font: Fira Code:size=12
*.symbols: Font Awesome 5 Free:size=11

/* name		dark	light */
/* black	0	8 */
/* red		1	9 */
/* green	2	10 */
/* yellow	3	11 */
/* blue		4	12 */
/* purple	5	13 */
/* cyan		6	14 */
/* white	7	15 */

/* theme */
*.color0: #1d2021
*.color1: #b73935
*.color2: #5d9179
*.color3: #f7a583
*.color4: #458588
*.color5: #b16286
*.color6: #7cafa3
*.color7: #d5c4a1
*.color8: #373737
*.color9: #ea6962
*.color10: #89b482
*.color11: #ffeca3
*.color12: #7daea3
*.color13: #d3869b
*.color14: #ace5d7
*.color15: #fbf1c7
*.background: #1d2021
*.selbackground: #373737
*.foreground: #fbf1c7
*.normforeground: #a89984
*.selforeground: #ebdbb2
*.cursorColor: #ebdbb2

/* st config */
st.font: Fira Code:size=12
st.symbols: Font Awesome 5 Free:size=12
st.termname: st-256color
st.borderpx: 5

/* dwm config */
dwm.borderpx: 2
dwm.gappx: 15